Year	% of cohort
1993	77.7187194824219
2005	85.048828125
2006	93.8678283691406
2007	92.3151321411133
2008	82.770149230957
2009	91.3616561889648
2011	75.5163192749023
2012	70.8329772949219
2013	89.4086227416992
2015	70.2409133911133